New article about the Tinfour contouring API

[gwlucastrig]

I've been working on a new wiki article that describes how to use the Tinfour contouring API. If you would like, you can view it at https://github.com/gwlucastrig/Tinfour/wiki/Using-The-Tinfour-Contouring-API

I'm still polishing the article, so it may change a little bit over the next several days. If you see anything that needs fixing or improvement, please let me know.

[micycle1]

Much superior to the previous article. I hadn't known of ContourUtilities.computeContourValues() or SmoothingFilter until now.